64685370 has 64 divisors (see below), whose sum is σ = 162000000. Its totient is φ = 16509696.

The previous prime is 64685363. The next prime is 64685371. The reversal of 64685370 is 7358646.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (64685371) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 129381 + ... + 129879.

It is an arithmetic number, because the mean of its divisors is an integer number (2531250).

Almost surely, 2^64685370 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64685370, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81000000).

64685370 is an abundant number, since it is smaller than the sum of its proper divisors (97314630).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64685370 is a wasteful number, since it uses less digits than its factorization.

64685370 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 687.

The product of its (nonzero) digits is 120960, while the sum is 39.

The square root of 64685370 is about 8042.7215542999. The cubic root of 64685370 is about 401.4227873566.

The spelling of 64685370 in words is "sixty-four million, six hundred eighty-five thousand, three hundred seventy".